Truck grader



April 15, 1941.

i FIG.

J. H. KERBER TRUCK GRADER Filed May 8, 1959 4v sheets-sheet i April 15, 1941. J. H. KERBER TRUCK GRADER Filed May 8, 1959v 4 Sheets-Sheet 2 MTL'W ATTORNEY April 15, 1941. J. H. KERBER TRUCK GRADER Filed May 8, 1939 INVENTOR YQQ wm mm ATTORNEY April 1s, 1941.

J. H. KERBER 2,238,389

TRUCK GRADER Filed May 8, 1939 4 Sheets-Sheet 4 FIG. I5.

INVENTOR f7/,mkv r 39 BY K QQTM ATTORNEY Patented Apr. 15, 1941 TRUCK GRADER Joseph H. Kerner,

lli-Way Service Milwaukee, Wis., assignor to Corporation, Milwaukee, Wis.,

a corporation ot Wisconsin Application May 8, 1939, Serial No. 272,491

The invention relates to road graders. The general object of the invention is to provide a scraper blade attachment that may be readily applied to an industrial truck vso that such truck can be used .for road patrol work and provide the motive power for operating the scraper blade and thus save the egpense of a special tractor grader.

One of the objects of the invention is. to provide an arrangement in which the scraper blade may be hung from hydraulically controlled -sups claims. (c1. afl-155) Fig. 7 is a detailed sectional view taken on the line 1-1 of Fig. 5;

Fig. 8 is a detailed sectional view taken on vthe line 8--8 of Fig. 3;

Fig. 9 is a detailed sectional view taken on the line 9--9 of Fig: .3;

Figs. 10, ,11, 12, and 13 are elevation views of the scraper blade or mold board showing it in different positions of vertical adjustment;

Figs. 145 and 15 are plan views ofthe mold board showing it in different positions of horiports mounted on the truck to adjust 'its elevation and verticall inclination.

Another object of the invention is to provide an arrangement in which the scraper blade is adjustable angularly in a horizontal plane vby a hydraulic cylinder.

A further object of the invention is to provide a scraper blade mounting in which Pin addition to the angular adjustment vertically and horizontally the blade also has a tipping adjustment so as to vary the angle or pitch that the cutting edge of the blade or mold board makes with' the roadway.

A further object o the invention is to provide a scraper blade with spring loaded roller to 4eliminate chattering of the blade.

A further object of the invention is to provide an under-slung rear axlefmounted push frame for the blade.'

A further Vobjectof the invention is to provide scraper structure invwhich the push frame has a swivel connection with the blade structure.

A further object of the invention is to provide a double acting hydraulic ram for changing lthe angular position of the scraper blade, said ram having a universal joint` connection with the blade structure.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Y

Fig. 1 is a side elevation view of a grader structure embodying the invention;

Fig. 2 is a plan view of the improved grader structure, parts being broken awaykand parts being shown in section;

Fig. 3 is a detailed sectional view taken on the line 3-3 of Fig.'2;

Fig. 4 is a detailed sectional view taken -on' the broken line 4-4 of-Fig. 2; A

- Fig. 5 is a detailed sectional view taken on the line 5-5 of Fig. 2;

Fig. 6 is a detailed view taken on the line of Fig. 1;

zontal angular-adjustment;

Fig. 16 is a detailed vertical sectional view taken on the l'line |6l6 of Fig. 4.

Referring to the drawings, I have shown the device embodying the invention applied to a motor driven truck I8 of conventional form and having a dump body i9 .and provided with an hydraulic pump 20 furnishing hydraulic uid 'under suitable pressure to a system including a vcontrollvalve mechanism 2U mounted adjacent the truck operators seat 'I8'.

The scraper blade or mold board 2l is con' nected to a frame 22 which-at its center is connected through a balland socket swivel joint 23' to an angular push frame 24, the legs of which at their base end are each respectively -pivotally connected at 25 to a bracket 21 which is clamped byV Ubolts28 to the rear axle housing 29 of the truck at a point outside the side frames 30 of said truck. The blade is vertically angularly adjustably mountedon the frame member 22 by ears 3| at its lower part connected to said member by pihs 32L and by ears 33 at lits upper part connected by bolts 34 to links 35 which in turn are adjustably connected to the member 22 by bolts 36 that are adapted to engage in any one of a series of holes 31 in said links 35, the blade being shown in full in Fig. 5 in one angular position and being shown in dotted in said iigure in another angular position.

At the end portions of the blade 2| the frame v member 22 has pin connections 38 to loosely receive the oval eyed ends 39 of hangers 39 which at their upper ends are secured by bolts 40 to arcuate slides 4I formed of welded together plates 42 and 43, the plate 43 being guided in each instance in arcuate guideways 44 formed 'in an arcuately curved supporting member 45 which in turn isvertically'slidably ,mounted on an'arcuate supporting member'46 whose ends are slidably mounted in vertically disposed guideways 46 formed in said members 45.

Each of the members 46 has angled brackets 41 welded thereto adjacent its ends, whose verits @la v ticaily disposed bases 48 are adapted to be secured to the outer side of the truck side bars 39 by bolts 49. Iransversely disposed frame members l) are welded tothe brackets 41 and extend transversely of and under the side bars 3U to which they are secured by U-bolts 5|. The curvature of the members 46 is such that when said members are clamped together, they form the sides of a turntable about which the hangers 3d may be turned through the turning of the slides 4| on their supporting members 45, the members also being vertically slidably mounted on tne supports including the members 46.

Hydraulically operated means are provided for raising and lowering the blade by raising and lowering the members 45. Each member 45 has a pin 52 connected to a lug 53 on the lower end of the rod 54 of a piston 55 which works in a cylinder` that is connected to the members 46 through ears 51 on said cylinder connected by bolts 58 to an angled bracket 59 secured to or formed integral with the member 46, said bracket being secured by bolts to the side bars 30. each cylinder with the split ends 6| carrying a bolt 6|' to clamp said sleeve to said cylinder and is interposed between the bracket 59 and the anged base 62 of the cylinder. The cylinder 56 is supplied at opposite ends with hydraulic iiuid from the valve mechanism 20 through suitable piping not shown in full but indicated by the dotted lines E3. Introduction of hydraulic fluid under pressure to the lower end of the cylinders 56 acts on the pistons 55 to raise the members 45 and hence the slides 4|, hangers 39, frame 22, and the blade 2| connected therewith to vary the vertical height of the blade 2| relative to the roadway being scraped as shown in Figs. 10 and 1l and by raising one end of the blademore than the other vary the vertical ang-ularity of said blade as shown in Figs. 12 and 13, the loose connections 38 permitting such angular adjustment of the blade.

The horizontal angularity of the blade is controledv by hydraulically operated means for said blade and its hangers angularly relative to the support. This means comprises an ,hydraulic cylinder 64 carried by the frame 2i and pivctally connected at 65 thereto, a piston S6 working in said cylinder and having a rod El cori-:ing through a stuiiing box in said cylinder and connected through a universal joint connection G8 with the frame member 22, the ends of said cylinder 64 being connected by suitable piping 59 including flexible portions to the control valve 2G.

With the above construction introduction of hydraulic iiuid under pressure to the closed end of the cylinder 64 causes the blade to be turned toward the right to the angular position shown in Fig. 2 and 15, and introduction of said fluid to the opposite end of said cylinder causes the blade to be swung to the position shown in Fig'. 11i.

'it is to be noted in connection with the hydraulic cyli'rnjlers that when pressure fluid is introduced at one side of the piston, uid is exhausted from the other end of the cylinder through the action ofthe control valve mechanism 29. As indicated in Fig. 2 each of the cylinders. 56 has its own control valve which is operated by n separate actuator 10 adjacent the opcrators seat I8', and thecylinder 64 has a control valve which is operated by the actuator Tl.

A split spacing sleeve 6I surrounds y To prevent a chattering action of the scraper blade, the ends thereof are each associated with a spring mounted roller 12. Each roller 12 is mounted on a ball bearing journal 13 on a shaft 14 carried by the arms 15 of a. yoke member 11 which has a split sleeve portion separated by the slot 11 with its parts clamped about the cylinder 16 by a bolt 11". The cylinder 16 is slidably mounted on a pin 18 which is secured at one end by a pin 19 to a. spacing sleeve 80' and spaced lugs on the blade 2| and is connected at its other end through a cap'82 provided with lugs that are adjustably secured by a bolt 83 passing through any one of a set of holes 8| in the spaced links 84 pivotally mounted on a bolt 85 carried by a lug 86 on said blade. A spring 81 is interposed between the cylinder 16 and the cap 82. The cap 82 is slidingly adjustable relative to the pin 18 and lsheld in adjusted position by means of a. nut 88 on the threaded upper end of the pin 18. With this arrangement the roller support including the cylinder 16 is yieldingly supported relative to the pin 18, and the blade andthe rollers provide in effect an additional support at the ends of the blade which prevent the same from chattering under certain` conditions of use.

From the foregoing it will be noted that I have provided a scraper blade apparatus Which may be readily applied to industrial type trucks and in which the blade may be moved to different horizontal and vertical positions through hydraulically operated cylinders which arevunder the control of the operator at his Seaton the truck.

I desire it to be understood that .this invention is not to be limited to any particular form or arrangement of parts except in so far-as such limitations are included in the claims.

What I claim as my invention is: y

1. The combination with a motor driven truck having side bars, a rear axle, and front and rear wheels, of supporting means clamped to said side bars in the space between said front and rear wheels, a grader blade, hangers connecting the operatively connected to the central portion of said blade and plvotally connected to the rear axle, and an hydraulic cylinder and its piston connected to said push frame and to said blade at a point offset from the central connection of said push frame with said blade and adapted to swing said blade in either direction in a generally -horizontal plane about said central connection.

3. The combination witha motor driven truck having side bars, a rear axle, and front and rear wheels, of supporting means clamped to said side bars in the space between said front and rear wheels, a grader blade, hangers connecting the ends of said blade with said supporting means,

means for independently raising and lowering each hanger and the end of the blade connected therewith, a push frame for said blade operatively connected to said rear axle, and means carried assenso" j by said push frame for swinging said blade angu-v larly relative to a horizontal plane.

, 4. The combination with a motor driven truck having'a frame. of supporting means clamped to said frame. a blade mounting member, a scraper' blade vertically vangularlyv adjustablyconnected at spaced: points to said member, means for hanging said member from said supporting means for vertical andangular movement relative thereto, means y for raising and lowering said hanging means, and independently supported meansoperatively con.- nected between a part of said truck and said member for moving said blade angularly.

5. The combination with a supporting frame including spaced side bars, of an arcuate support clamped to each side bar, an arcuate member vertically slidably mounted on each support, a

slide vlaterally slidably mounted in each arcuateA arcuate member, a slide laterally slidably mountv ed on each arcuate member. a blade structure,

hangers connecting the'- end portions of the blade o v .sTl'ie' .combination with. a supporti structure. .with 'said Slides, and' mea-ns including anv hydraulic. cylinder" and yits ram` loperatively connectedtoxsaldlblade.structureioraswinging inc1udixispace'd side bars .ando-,a megane, o'fjan 'j arcuate support clamped-"to each-side ba-r,"'an

arcuate member vertically slidably'mountedfon each support, 'a slide laterally yslidalolyjniounted on eacharcuate member, aibladestructureyhang; ersconnecting the endV '.portionsjof'lthebladev structure with 'said 'slide's,. an "hydraulic cylinder 'i having its piston operatively)connected tojeach arcuate member for independently' raisingand .lowering the same, ja push framefpivotally 'connectcd to the rear axle and' connected tothe cene o j" -tral portion of saidv blade structuraandm'eans C carried yby said push frame and connected' to said. blade structurel to turn said blade in a 'generallyA Y.

horizontal plane. A

s. 'The combination-wah a motor einen truck having side barsa rear axle and frontand rearl wheels, of supporting means csla'rnp'edtol said side bars in theispace between said front land-'rear Wheels, ay grader blade, hangers connected with the end portions of theblade, hydraulic'allyopjerated means'for independently raising 'and'lowering each hanger andthe end of the blade con v nected therewith, I`a push framel for said` blade operatively connected to said rear axle, and hydraulically operated means' carried by said push frame and operatively connectedto said blade to turn the same in' a generally horizontalplane. JOSEPH H.KER BERK-' 

